题目内容
4．When I got home，my motherwas cooking（cook）in the kitchen．分析 翻译：当我到家时，我妈妈正在厨房做饭．
解答 答案：was cooking．根据When I got home并结合语境可知：我到家时，妈妈那时正在厨房做饭，故用过去进行时，过去进行时的构成：主语+was/were+V动词的ing，主语是my mother，故用was，故答案为was cooking．
点评 本题考查的是过去进行时，表示在过去某一时刻或某一段时间内进行或发生的动作．
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